nsarray 中自定义对象 NSString 属性的唯一值
我有一个存储自定义对象的数组。 对象属于 Venue 类型，其属性定义为 name（其中包含场地名称）。
现在我想过滤掉具有唯一名称的对象。
这就是我试图做的。
NSSet *uniqueVenuesSet = [NSSet setWithArray:[venueArray valueForKey:@"name"]];
NSMutableArray *uniqueVenues = [[NSMutableArray alloc] initWithArray:[uniqueVenuesSet allObjects]];
当我运行这个时，我收到此错误。
-[NSCFString name]: unrecognized selector sent to instance 0x69a6190
2010-10-24 09:25:31.832 [75790:207] Terminating app due to uncaught exception 'NSInvalidArgumentException', reason: '*** -[NSCFString name]: unrecognized selector sent to instance 0x69a6190'
谁能给我指点一下如何去做。
I have an array which stores custom objects.
Objects are of type Venue which have a property defined as name(which contains the names of venue).
Now I want to filter out objects with unique names.
This is how I was trying to do.
NSSet *uniqueVenuesSet = [NSSet setWithArray:[venueArray valueForKey:@"name"]];
NSMutableArray *uniqueVenues = [[NSMutableArray alloc] initWithArray:[uniqueVenuesSet allObjects]];
I get this error when I run this.
-[NSCFString name]: unrecognized selector sent to instance 0x69a6190
2010-10-24 09:25:31.832 [75790:207] Terminating app due to uncaught exception 'NSInvalidArgumentException', reason: '*** -[NSCFString name]: unrecognized selector sent to instance 0x69a6190'
Can anyone give me a pointer on how to go about it.
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这是因为
venueArray中至少有一个NSString对象。确保
venueArray中的每个元素都是Venue类型。This is because there is at least one
NSStringobject invenueArray.Make sure that every element in your
venueArrayis of typeVenue.